Being hurtfull or discriminatory to an obese person. Also only other fat people can tell other fat people that they are obese or chubby, just like black people being racist to other black people
John: Dude, fred just called you a tub-of-lard!
Michael: No man it's cool, he's fat like me, it wasn't obesist!
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.